Most common complication of pseudocyst
**Core Concept**
Pseudocysts, also known as pancreatic pseudocysts, are fluid collections that form in the abdomen, often as a result of pancreatitis or pancreatic trauma. These cysts are not true cysts, as they do not have an epithelial lining, but rather are collections of pancreatic secretions and necrotic tissue.
**Why the Correct Answer is Right**
The most common complication of pseudocysts is rupture, which can lead to severe abdominal pain, bleeding, and potentially life-threatening infection. Rupture can occur into the peritoneal cavity, the stomach, the small intestine, or the retroperitoneal space. The risk of rupture is higher in pseudocysts that are large, have a thin wall, or are located near a major blood vessel.
**Why Each Wrong Option is Incorrect**
* **Option A:** Infection is a possible complication of pseudocysts, but it is not the most common one. Infection can occur if the pseudocyst ruptures or becomes contaminated with bacteria.
* **Option B:** Hemorrhage is a potential complication of pseudocysts, particularly if they are located near a major blood vessel. However, it is not the most common complication.
* **Option D:** Malignancy is not a direct complication of pseudocysts. While pseudocysts can occur in patients with pancreatic cancer, the pseudocyst itself is not a malignant process.
**Clinical Pearl / High-Yield Fact**
Pseudocysts are more likely to rupture if they are large (>6 cm in diameter) or have a thick wall. A high index of suspicion for rupture is necessary in patients with a history of pancreatitis or pancreatic trauma.
**Correct Answer:** C. Rupture